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| subject: | Re: ATM Tesing a spheriod |
From: "mlbrown{at}everstrive.com"
To: atm{at}shore.net
Reply-To: "mlbrown{at}everstrive.com"
I concur. I've done about 20 hours just trying to get a 1/4 wave sphere
out of that little 4.25" mirror I've been working on. I think I've
migrated thru just about every surface defect in the book: turned down
edge, to zonal rings, to hill with crater in middle and turned down edge,
now to turned up edge. I keep repeating to myself that this hobby both
requires and teaches patience. I'm close though; any day now...
=Matt
>>>>>Ah, Yes. Easy to test is right. I labored through
probably 20 hrs of
figuring to get a good sphere 8" f/15. I wanted the best reference sphere
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